MCS0 - 80186 Middle bank Chip Select #0
MCS1 - 80186 Middle bank Chip Select #1
MCS2 - 80186 Middle bank Chip Select #2
MCS3 - 80186 Middle bank Chip Select #3
UCS  - 80186 Upper bank Chip Select

MCS0 - U60 Even / U160 Odd
MCS1 - U70 Even / U170 Odd
MCS2 - U80 Even / U180 Odd
UCS  - U90 Even / U190 Odd

MCS0 - 88000-8FFFF 27128 / 80000-8FFFF 27256
MCS1 - 98000-9FFFF 27128 / 90000-9FFFF 27256
MCS2 - A8000-AFFFF 27128 / A0000-AFFFF 27256
UCS  - F8000-FFFFF 27128 / F0000-FFFFF 27256
